Wow, an actual ROM and not someone just dialing down the resolution and color depth in an engine that would have no chance of running on 8-bit HW!
yee, go real or go home
You'd be disappointed about many retro game jam rules...
At least the Game Boy is very predictable: the biggest limitation is the screen and buttons so if it's graphics based on 8x8 tiles plus reasonably sized sprites, or fullscreen pics at low frame rate, it can most likely do it.
However, the SNES could do wild stuff (some graphics modes feature high color depth or double resolution) but anything more complex than All Stars required quite a bit of trickery. Yes, 512px horizontally, 480i, 3D perspective of a plane, color math etc. have been achieved but each takes a significant portion of the resources so it's very hard to pin down the limitations of what would be possible at once. Not to mention enhancement chips...
alright, ill bite, whats up with the jam rules
Some jams allow any engine. The ones that require actual ROMs are much less popular.
boooooo, boo i say!
What is a demake?
A demake is a Game that's purposefully built as if it where conceived and produced during a previous hardware or software generation.
Rules: